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Manual 37128A GCP-20 Series - Genset Control

Load Sharing with Other Generators in Mains Parallel Operation

The load-dependent start/stop function is activated for every control when the following criteria has been met:

• the operation mode AUTOMATIC has been selected

• interchange power control (import/export power) has been activated by one of the two discrete inputs ("Auto-

matic 1" or "Automatic 2") (" E " or " I " power)

• all parameters, such as start/stop power, start/stop delays, and selected set point values are identical for all

generators involved

• one or both parameters "Load-dependent stop/start on terminal 3/5" has been configured to "ON"

• the parameter "Load sharing" or "var sharing" have been configured to "O N"

• the same rated power is available from all generators.

NOTE

The following Parameter 88 only applies if more than one generator is to be started in mains parallel

operation. The first engine is started as described under single generator in mains parallel operation

on the basis of the minimum generator power.

Parameter 88

Reserve power

mains op. 0000kW

Load dependent start/stop: reserve power 0 to 9,999 kW

Starting of an additional engine is determined via the reserve power. The reserve

power results from the currently available total generator rated real power (genera-

tor rated real power × number of closed GCBs) and the currently available total

generator actual real power. If the currently available total generator actual real

power is subtracted from the currently available total generator rated real power,

this results in the system's reserve power. If negative deviation from this reserve

power occurs, the next engine is started.

Currently available total generator rated real power

- Currently available total generator actual real power

= Reserve power

Parameter 89

Isolated/mains

Priority 0

Load dependent start/stop: priority of generators 0 to 8

This priority specifies the sequence in which the individual engines are started. The

control with the lowest configured number has the highest priority. This engine is

the first to be started and the last to be stopped. In the event of identical priorities,

the starting sequence is determined by the operating hours. In this case, the engine

with the lowest operating hours takes priority. In the event of the same number of

operating hours, the engine with the lowest control number (generator number,

Parameter 4) is started.

Woodward GCP-20 Series User Manual

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